27.Little Sandy finds ______ very hard to open her mouth to speak.A.that B.it 请告诉我为什么是B而A不对.

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27.Little Sandy finds ______ very hard to open her mouth to speak.A.that B.it 请告诉我为什么是B而A不对.

27.Little Sandy finds ______ very hard to open her mouth to speak.A.that B.it 请告诉我为什么是B而A不对.
27.Little Sandy finds ______ very hard to open her mouth to speak.
A.that B.it
请告诉我为什么是B而A不对.

27.Little Sandy finds ______ very hard to open her mouth to speak.A.that B.it 请告诉我为什么是B而A不对.
这句话这么理解,
Little Sandy finds...
Finds什么?就是后面的那句话.
而后面的那句话
正确语序应该是
To open her mouth to speak is very hard.
我们都知道动词不定式可以做主语,但是会显得头重脚轻,又由于是宾语从句,所以用It来做形式宾语.
全句也就变成
Little Sandy finds it very hard to open her mouth to speak.

后面的句子应做为finds的宾语,但是后面的句子没有主语,故横线上应填一个主语,所以选B

B选项在这里作形式主语,it其实是做后面的主语!修饰very hard to open her mouth!

that 缺少主语。it是形式主语。